Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham xuc » cam xuc, chat xuc, cham soc
ban hanh » ban hang
su sach » so sach
vu sach » vu bach, vu khach
nang ma » tang ma, sang ma, mang may
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky ((nang ma) OR (nang cao)) hoi. hieu qua cham xuc ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky ((nang ma) OR (nang cao)) hoi. hieu qua cham xuc ban hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky ((nang ma) OR (nang cao)) hoi. hieu qua cham xuc ban hanh vi cua tre*.